285228470898 has 126 divisors (see below), whose sum is σ = 722963227311. Its totient is φ = 81271794744.

The previous prime is 285228470887. The next prime is 285228470909. The reversal of 285228470898 is 898074822582.

285228470898 is a `hidden beast` number, since 2 + 8 + 52 + 28 + 470 + 8 + 98 = 666.

It is an interprime number because it is at equal distance from previous prime (285228470887) and next prime (285228470909).

It can be written as a sum of positive squares in only one way, i.e., 142614235449 + 142614235449 = 377643^2 + 377643^2 .

It is a tau number, because it is divible by the number of its divisors (126).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=377643.

It is a super-2 number, since 2×285228470898² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 777189111 + ... + 777189477.

Almost surely, 2^285228470898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285228470898

285228470898 is an abundant number, since it is smaller than the sum of its proper divisors (437734756413).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285228470898 is an frugal number, since it uses more digits than its factorization.

285228470898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 63.

The spelling of 285228470898 in words is "two hundred eighty-five billion, two hundred twenty-eight million, four hundred seventy thousand, eight hundred ninety-eight".